Peripheral feed breaker



May Yl0, 1955 o. DANYLUKE 2,708,075

PERIPHERAL FEED BREAKER Filed lay 29, 1952 l 4 Shee'ts-Sheet l ATTORNEYFiled May 29, 1952 4 Sheets-Sheet 2 May 1o, 195s Q DANYLUKE 2,708,075

PERIPl-IERALl FEED BREAKER Filed May 29, 1952 4 Sheets-Sheet 3 INVENTOR.raP amvza/fa BYU May l0,I 1955 o. DANYLUKE' PERIPHERAL FEED BREAKERFiled )lay 29. 1952 4 Sheets-Sheet 4 JTTORNEY United States Patent Oilice 2,708,075 Patented May 10, 1955 PERIPHERAL FEED BREAKER OstapDanyluke, Philadelphia, Pa., assignor, by mesne assignments, to BathIron Works Corporation, Bath, Maine, a corporation of Maine ApplicationMay 29, 1952, Serial No. 290,804

16 Claims. (Cl. 241-138) rIdhis invention relates to Bradford typebreaker mills and more particularly to the drum structure and the feedfor the drum structure. It is directed to the breakage of the materialin the initial stages of breakage and the introduction of the materialinto the initial stages.

An object of the invention is to increase the amount of breakage of thematerial fed into a Bradford type breaker for a given drum length.

Another object ofthe invention is to increase the per unit lengthbreakage of a Bradford breaker drum.

Another object of the invention is to provide a Bradford type breakerdrum that produces more than one type of fines.

Another object of the invention is to provide a Bradford type breaker inwhich the material is proportionately split within the breaker andeliminating secondary exit :l

A further object of this invention is the elimination of t secondarysplitting chutes beneath a Bradford type breaker.

A still further object of this invention is to provide a Bradford typebreaker having aV feed intermediate the ends and rotating hammers withinthe breaker at each .5

end.

Other and further objects and advantages will appear from the followingdescription taken in connection with the .drawings in which:

Fig. 1 is a sectional side view of a mill of this invention l withhammers at each end;

Fig. 2 is a sectional view of the mill taken along lines 2-2 of Fig. l;

Fig. 3 is a perspective view of the feeding structure;

Fig. 4 is a schematic perspective side view of the feed structurewithout the drum; and

Fig. 5 is a schematic perspective top view of the feed structure withoutthe drum.

Referring to Fig. 1 a Bradford type breaker 10 is shown comprising arotating breaker drum 11 with a left breaker drum section 12 and a rightbreaker drum section 13 rotatably mounted in a casing 14. A feedingstructure 16 rigidly fastened within the drum 11 and rotating with italternately feeds material to the drum sections 12 and 13. Material isdelivered to the feeding structure 16 by the conveyor 17 (Fig. 2)dropping the material through an opening in the casing 14. The materialfalls into the drum 11 and is subjected to the breaking and siftingaction of the rotating drum. The oversized material is lifted inside thedrum on shelves 25 and 26 and repeatedly dropped to cause fracture andreduction of the oversize pieces to the desired sizes. As the materialis tumbled it iii) is moved from the center of the breaker 10 towardsits ends. The broken and undersized material passes through openings 20and 21 in walls 38 and 39 of the drum sections 12 and 13 respectivelyand drops through exit chutes 22, 23 respectively at the bottom of thecasing 14. The oversized and unbreakable material passes out through theopenings at each end of the drum 11 and drops through the refuse chutes18 and 19 at the ends of the casing 14.

In Fig. 2 a door 24 is hingedly mounted on the casing above the opening15. When the door 24 is lowered the incoming material drops into thefeeding structure 16. In the raised position the door 24 blocks thepassage between the drum 11 and the conveyor 17 and diverts thematerialthrough a by-pass passage 40 into the exit chutes 22, 23.

As shown in Fig. l, the walls 38 and 39 of the drum sections 12 and 13respectively are securely mounted to the inner surfaces of rail beams 37which are evenly spaced around the periphery of the drum 11 and aresecured at their ends to spiders 35 and 36 at the respective outer endsof the sections 12 and 13. The spiders 35 and 36 have hubs 78 and 79mounted in bearings 80 and 81 so as to rotatably support the drum 11 onlateral beams 82, 83 respectively which are adjacent and outside theends of the casing 14.

The openings 20 and 21 in the walls 38 and 39 are evenly distributedthroughout the drum walls of both sections. These holes may be of anydesired size depending upon the type of material fed to the drum and thedesired resulting broken material. The material is tumbled by thelifting shelves 25 and 26 and moved axially until it is properly sizedand falls through the openings in the walls. The discharge of theunbreakable material at the ends of the drum may be done by theconventional plows 33, 34 pushing the material through the openings inthe spiders 35, 36 into the refuse chutes 18, 19 repectively.

The ends of the drum sections 12 and 13 have hammer rotors 72, 73mounted on the radial spiders 35 and 36, respectively. The spiders and36 cach have a hub 78 and 79 respectively upon which the spiders 35 and36,

are carried, and in turn the section 12 and 13 and drum 11 including thefeeding structure 16.V The left hub 78 is supported and turns in abearing 80 while the right hub 79 is supported and turns in a bearing81. The bearings 80 and 81 are supported in a suitable manner such as apair of laterally extending beams 82 and 83 shown in Fig. l supportingthe bearings 80 and 81 respectively. Thus the drum 11 rides on the beams82 and 83. The right hub 79 is keyed, not shown, in a sprocket wheel 84to which power may be applied.

The hubs 78 and 79 at each end of the drum 11 are axially hollow toreceive shafts 85, 86 inserted through each of them into the respectivedrum sections 12 and 13. These shafts 85, 86 support the hammer rotors72, 73in each end of the drum 11 These two hammer rotors 72, 73 aresymmetrically arranged in the drum 11. The shafts 85, 86 are supportedat the inner ends of the respective hubs 78 and 79 in bearings 87, 88,and at the outer end of hubs in bearings 87a and 88a. Extending into thedrum sections, 12 and 13 from the bearings 87, 88 the shafts 85, 86carry a succession of spacing disks 89 and plain disks 90 alternatively.The plain disks 90 carry hammer suspension bars 91 from whichare hungswinging hammers 92. The shafts 85, 86 are driven by motors-93, 94respectively through couplings 95, 96. The hammer rotors 72, 73 are thusrotated within and independently of the drum sections 12 and 13. Withthis central feed the bearings 80, 81 may be mounted on top of the beams82, 83 instead of being suspended from below.

The feed structure 16 is axially positioned between the drum sections 12and 13 and is rigidly fastened to the rail beams 37. In the embodimentshown the feed structure is divided into four separate chutes 45, 46,47, 48 of the same size. The chutes are arranged to alternately feed thedrum sections 12 and 13. Each drum subtends substantially a quarter ofthe periphery of the drum. Feed chutes 45 and 47 feed the right section13 and feed chutes 46 and 48 feed the left section 12. The material fromthe feed passage 41 enters the feed structure 16 through the openings 50between the rails 37 into the feed chute. The material then hits theinclined surface 52 of the chute and the leading partition surface 74and the trailing partition surface 75. The material is diverted at anangle into the drum section. In this particular embodiment the equalfeeding of material to both sides is desired so the feed chutes 45 to 48are of substantially the same structure as 45 and 47 except that chutes46 and 4S are turned to feed in the opposite direction. ln Fig. 2 thefeed chutes 46 and 48 are shown with the inclined surface facingoutwardly and feed chutes 45 and 47 are viewed a from the rear.

In Fig. 3 the feed structure is perspectively viewed from the drumsection 13 end and from the feeding side of the feed structure. The feedchute 45 is positioned to receive the material and deliver to the drumsection 13. if

The position of the material feed 41 is indicated in outline so that theview of the feed structure is not obscured. The edge 42 is positioned tofeed the material below the top of the feed structure and preferably atthe midpoint of the quadrant. The tilt of the feed passage is f set sothat the material enters the feed structure at a forty to fty degreeangle from the horizontal. The feed 41 is also set at an angle betweenforty and fifty degrees,

The feed structure comprises two radial flanges 55, 56

spaced axially to provide a peripheral opening 49 be- A memberspreferably have a generally conical pie shape and extend from the radialflanges to one of the yopposite hubs. Members 67 and 69 extend from theradial flange S to the hub 62 and members 68, 70 extend from the radialflange 56 to the hub 61. The members 67,

69 are circumferentially at ninety degrees to the members 68, 70 andfeed in the opposite direction. The hubs 61, 62 are axially spaced fromone another along the ccntral axis of the drum 11 substantially the samedistance as the spacing of the a-nges. Preferably the hubs should be inthe plane of the respective flanges.

In each chute the chute member forms the deflecting surface 52 and thepartition plates form the leading dellecting surface 74 and the trailingdeflecti'ng surface 75. The surface 52 extends circumferentially fromone par tition surface to the next to form a solid deeeting chute todirect substantially all of the incoming material into a drum section.

The partition plates 63, 64, 65, 66 are triangular in shape with thetrailing partition plate forming a continuous wall from the hub of thechute to the rail beams 37. This forms a continuous surface 75 acrossthe triangular shaped space between the pie shaped chute member forniingthe surface 52 and the feed end of the drum section. This is clearlyindicated .in Fig. 4. Considering chute (Fig. 3) the ,partition plate 64between chutes 45, 46 extends from the plate to the hub 62, with theedge '97 extending from the flange 56 to the hub 62.

The leading partition surface 74 does not extend to the hub of the chutesurface 52. Theedge 98, also indicated onpartition plate 64, extends tothe other Ahub `61`as best illustrated in Fig. 5. This leaves atriangular opening 99 (Fig. 5) between the end of the drum section, thepartition plate and the chute member.

The chute members 67, 68, 69, are supported in the rear by a backingmember or plate 101, 102, 103, 104 respectively. The backing plate isalso pie shaped and has a conical surface and extends from the midsection of the chute member to a hub. The surface 105 of the backingplates are preferably continuous with the adjacent chute surfaces 52.

The partition plates preferably extend from the side of the hub or offcenter from the central axis in order to set the partition plates at aslight angle to the radii of the drum.

These plates and members may be bolted together in any convenient andconventional manner. The representation of the connections, anges, boltsand nuts have been omitted for purposes of simplicity and clarity ofrepresentation. The chute members may be made of a number of flattriangular shaped plates with flanges along the edges at an angle toform the conical surface 52. The partition plates may also be fastenedto the chute member and the radial flange and rail beams. The deflectionplates 5S, 59, 60 may be mounted on the flanges or the rail beams.

The material enters between the enclosing radial walls 55, 56 which formpassages or openings 50 from outside of the drum to within the drum.

The rail beams 37 traversing the space between the walls 55, 56 havedeflection plates 58, 59 and 60. Deflection plate 66 faces in thedirection of rotation of the drum and hits the material as it leaves thefeed 41. The plate faces inwardly towards the feed chute so that thematerial hit by the plate is deflected inwardly out of the path of theplate 6l) and rail beam 37. The plates 58 and 59 on the top and rear ofthe rail beam are moving away from the entering stream of material. Thetop plate 59 is sloped rearwardly and inwardly to deflect the materialinto the following opening. The plates 59 and 66 meet at their outeredges so that the outer peripheral space between the radial walls 55, 56presents a substantially continuous opening 49 around the feedstructure. The lower rear plate 58 is at a greater angle to the enteringmaterial and deflects it directly into the feed chute.

The greater portion of the entering material passes directly through theopening 50 in the form of a ribbon and strikes against the inclinedsurface 52 and is directed into the drum section 13. The surface` 52 issubstantially of a convex conical shape extending inwardly from the thedeflection plate .60 to the hubs 6i and 62 respectively.

The upper portion of the plate 67 forms a wall between the feed chute 45and feed chute 43 and similarly theupper portion of the plate 68 forms awall between the 'feed chute 4S and feed chute 46. These upper wallportions confine the material to the particular feed chute and preventit from spilling into adjacent chutes. 'The lower portions provideadditional guide surface to conne the entering material to within thefeed chute and direct it into the drum section.

The radial walls 55, 56 have radial portions 107` 108 extending`inwardly from the rail beams 37 'to form a retaining wall or surfacealong the screen Vand prevent material from 'falling through theopenings 50 at the bottom of the feed structure. The width of this4retaining wall should be large enough to prevent rthe spilling of thematerial piled in the bottom of the drum into the openings 50 and smallenough so as not to restrict the 'flow of material through the opening.The width of -thc radial Yportion is preferably half of 'the width vofenclosing radial Walls 55, 56. The partition walls extend upwardly inbetween -these walls 'to the delleeting plates 60. The outer surface ofthe deilecting plates 60 and the trailing surfaces 75 preferably formcontinuous surfaces from the periphery of the feed structure to the hubof the feed chute.

Considering the action of the entering material the conveyor 17 dropsthe material into the feed passage 41 in which the material spreadslaterally to form a ribbon of material that slides into the feedstructure at an angle between and 50 degrees. The material passesthrough the openings and drops on the inclined surface. The leading wall74 moves away from the entering stream and only momentarily receives animpact of material. The material primarily strikes along the length ofthe inclined surface. The inclined surface deects the material at anacute angle into the drum section and the material pours over the hub ofthe feed structure. The trailing surface 75 being in a substantiallyhorizontal position at the beginning of the recep tion of the materialinto the feed chute catches entering material and tends to hold it sothat it piles up. As the f surface 75 moves to a vertical position thematerial slides off the sub end into the drum section.

The deflection plates 58, 59, and interrupt the smooth flow of materialinto the chute. The plate 60 is tilted to face inwardly and imparts aforward component of movement to the material tending to carry thematerial with the plate surface. The pitch of the plate imparts aninward component which moves the material away from the plate 60 andinto the chute. The plate 59 is sloped inwardly in the oppositedirection and deflects the material into the succeeding chute.

It is preferable that the slope of plate 59 should be great enough topresent 'the vplate always at an inward angle to the material feed. Withthe plate at this angle and moving away from the entering material. Theim y pinging material deliects off of the plate into the succeedingopening. The angle and speed of movement of the plate reduces thespillingv and scattering effect to a negligible amount thus reducing thelost material to an inconsequential amount.

The plate 5S is at an even greater angle to the entering material anddeects the impinging material into the chute. With the feed 41 midwaydown the upper quadrant of the drum any material carried by thedeflection plates or bouncing upwardly has an opportunity to dropthrough the opening into the chute while the chute is still in a feedingposition. The chute remains in a feeding position after the trailingpartition platehas passed the feed 41 and the succeeding chute isreceiving the entering material. The remaining material in the chute hastime to slide out before the inclined surface is turned on its side andthence into the reverse or upside down position, Any material caught orcarried by the deflection plates will drop into the chute before beingcarried to the bottom of the drum.

the drum walls 36, 37 and piles up at the entrance end. The radialplates extending' inwardly from the drum wall form a retaining wall.This wall prevents the material from falling through the opening 50 intothe exit chutes. The moving drum wall carries the material up the sideof the drum wall. The material of the proper size is screened throughthe openings 21 in the drum wall. The oversized material Visprogressively moved to the end of the drum section. In the embodimentshown in Fig. l rotating hammers are pro vided at the exit end to reducethe oversized material reaching the exit end to the desired size. Thematerial is picked up by the end lifting shelves and dropped in thehammercircle. The rotating hammers break up the remaining pieces ofmaterial. The unbreakable pieces such as tramp iron and the like ispicked up by the ploughs 33, 34 and forced out into the refuse chutes18, 19.

As the entering material drops onto the inclined surface it receives itsinitial breaking or reducing action.

"f chute.

3. A Bradford type breaker as claimed in claim 2` The incline of thesurface 52 clears the material so that the material is continuallysmashing against the surface.'

Further reduction action occurs as the material drops on to the drumwall. With the entering material pouring into the drum the greatestaccumulation of material occurs at the entrance end of the drum. Theinitial tumbling action causes the greatest amount of material to passthrough the drum wall openings at the entrance end. At the exit end ofthe drum the amount of material reduced and sifted through the drum isconsiderably` less than the entrance end. With the shortened drum lengththe higher productive portion is utilized and the les's The feedstructure as protective portion eliminated. shown permits the inclusionof two of these high productive drums in the same length of previousdrums; It' is thus seen that the effective breaking and sifting area`The feed structure shown permits breakers not only.

of increased output but of greater versatility. With two separate drumsdifferent types of nes may be within a given drum length. One drumsection may be set for' one size and the other drum section for anothersize fine. Also the length of the two drum sections maybe different toaccommodate the requirements of the succeeding hammermills.

Although a particular embodiment has been shown` and described variousmodifications and changes may be made without departing from the scopeof the invention.

I claim:

1. A Bradford type breaker comprising a rotatableV drum having evenlyspaced parallel rail beams arranged to form a cylindrical shape and drumWalls mounted on said beams to form two axially spaced crushing drumsections, two circumferential flanges on adjacent spaced edges of saiddrum walls to form a peripheral passage from outside of said drum towithin said drum and form ing a retaining wall along the edge of saiddrum section',

said passage intersected by said rail beams to form spaced. Openings insaid passage outside of said drum walls, two

axially spaced hubs in the center of the drum and in the radial plane ofa respective flange to form concentric ring shaped openings in the planeof the respective flanges,` sectorial defiecting chutes uniformlyarranged around the axis and extending radially at a longitudinal angleThe material dropping into the drum section falls on to the axls of thedrum from the Inner edge of a flange to the hub in the plane of theopposite flange and with adjacent chutes facing in opposite directionsso that as the drum rotates material entering through the passage isalternately deflected into one drum section then into the'other.

2. A Bradford type breaker as claimed in claim 1v wherein partitionplates are positioned between adjacent deflecting chutes to form feedchutes and prevent material from passing from one chute into an adjacentwherein the partition plate on the trailing edge of the deecting chuteextends the full length of the chute from the peripheral anges to thehub.

4. A Bradford type breaker as claimed in claim 3 wherein said partitionplate on the trailing edge extends a slight angle to the radial and istangential to the hub at a point to provide the partition plate with aforward tilt.

5. A Bradford type breaker as claimed in claim 3 wherein a radialextending plate is positioned adjacent the leading edge of the rail beamto deilect entering material into a respective feed chute.

6. A Bradford type breaker comprising a supporting drum frame having endspiders and longitudinal parallel bars uniformly spaced on said spidersin a cylindrical Shape, drum walls with screening openings mounted onsaid bars to form two axially aligned drum sections having adjacent endsaxially spaced to form a peripheral opening for material to enter intosaid drum sections each with initial screen area adjacent the passage,two circumferential flanges each extending radially through theperipheral opening and positioned on the adjacent spaced edges of saiddrum walls to form an entering passage from outside of said drum towithin said drum, hubs position on the axis and at adjacent ends of thedrum to form openings between the corresponding flanges said passageintersected by said rail beams to form spaced openings around the outerportion of said passage, a material feed at approximately forty-fivedegrees and posi tioned at a point approximately forty-five degrees fromthe horizontal position to feed material into the passage, a deliectingstructure secured to the rail beams and rotating therewith having atleast four feed chutes sectorially dividing the space between said drumsections to alternately feed the material received from the materialfeed through the passage on to the respective initial screen areas ofthe drums as the breaker rotates, each feed chute comprising adetiecting surface, a leading surface and a trailing surface, saiddetiecting surface extending from a hub point on the axis of the drumand in the plane of one of the radial anges and widening outwardly tothe inner peripheral edge of the opposite radial flange for divertingthe radially entering material from the material feed longitudinally atan angle through the opening between the hub and the inner edge of thecorresponding flange, said leading surface being axially disposedcrosswise of the passage and extending inwardly towards the hub from thebars to the intersectors of adjacent deecting surfaces for separatingone preceding feed chute from one succeeding feed chute, said trailingsurface being axially disposed crosswise of the passage and extendinginwardly to the hub to provide a diverting surface between saiddefiecting surface and the plane of the concentric opening to collectentering material and f' direct it in cooperation with the deflectingsurface onto the screen area of a respective drum section, said initialscreening area sorting out the oversize material and passing it alongthe drum, lift shelves mounted on the drum walls extending along thescreen areas to the respective end spiders to pick the material up anddrop it on the drum wall to break it to the proper size for passingthrough the openings, hammer rotors rotatably mounted on the spiders ateach end of the drum for receiving the remaining oversize material andreducing it to the proper size.

7. A Bradford type breaker comprising a supporting drum frame having endspiders and longitudinal parallel bars uniformly spaced between saidspiders in a cylindrical shape, drum walls with screening openingsmounted on said bars to form two axially aligned drum sections havingadjacent ends axially spaced to form a peripheral opening for materialto enter said drum sections each with an initial screening area adjacentthc passage, two circumferential anges each extending radially to theperipheral opening and positioned at the adjacent spaced edges of saiddrum walls to form an entering passage from outside of said rail beamsto within said drum, said passage intersected by said rail beams to formspaced openings around the outer portion of said passage, a materialfeed at aproximately forty-five degrees to the horizontal and at a pointapproximately forty-tive degrees above the horizontal on the side of thedrum to feed material into the passage, a dellecting structure securedto the rail beams and rotating with the supporting drum frame at leastfour feed chutes sectorially dividing the space between said drumsections to alternately feed the material received from the materialfeed through the passage on to the respective initial screen areas ofthe drums as the breaker rotates, each feed chute having a detlectingsurface extending from a point on the axis of the drum and in the planeof the radial flanges and widening outwardly to the inner peripheraledge of the opposite radial ange for divert ing the radially enteringmaterial from the material feed longitudinally at an angle through theopening between the center point and the inner edge of the ange and dropit on to the respective initial screening area for sorting out theoversize material and passes it along the drum, lift shelves mounted onthe respective drum walls extending along the screening area to the endspider to pick the material up and break it to the proper size forpassing through the openings, hammer rotors rotatably mounted on thespiders at one end of each drum section for receiving the nal oversizematerial and reducing it to the proper size.

8. A Bradford type breaker comprising a supporting drum frame having endspiders and longitudinal parallel bars uniformly spaced between saidspiders in a cylindrical shape, drum walls with screening openingsmounted on said bars to form two axially aligned drum sections havingadjacent ends axially spaced to form a peripheral opening for materialto enter said drum sections each with an initial screening area adjacentthe passage, two circumferential anges each extending radially to the'peripheral opening and positioned at the adjacent spaced edges of saiddrum walls to form an entering passage from outside of said rail beamsto within said drum, said passage intersected by said rail beams to formspaced openings around the outer portion of said passage, a materialfeed to feed material into the passage, a deflecting structure securedto the rail beams and rotating with the supporting drum frame at leastfour feed chutes sectorially dividing the space between said drumsections to alternately feed the material received from the materialfeed through the passage on to the respective initial screen areas ofthe drums as the breaker rotates, each feed chute having a decctingsurface extending from a point on the axis of the drum and in the planeof the radial flanges and widening outwardly to the inner peripheraledge of the opposite radial flange for diverting the radially enteringmaterial from the material feed longitudinally at an angle through theopening between the center point and the inner edge of the ange and dropit on to the repective initial screening area for sorting out theoversize material and passes it along the drum, lift shelves mounted onthe respective drum walls extending along the screening area to the endspider to pick the material up and break it to the proper size forpassing through the openings, hammer rotors rotatably mounted on thespiders at one end of each drum section for receiving the nal oversizematerial and reducing it to the proper size.

9. A Bradford type breaker comprising a supporting drum frame having endspiders and longitudinal parallel bars uniformly spaced between saidspiders in a cylindrical shape, drum walls with screening openingsmounted on said bars to form two axially aligned drum sections of equallength having adjacent ends axially spaced to form a peripheral openingmidway between the spiders for material to enter said drum sections eachwith an initial screening area adjacent the passage, two circumferentialanges each extending radially to the peripheral opening and positionedat the adjacent spaced edges of said drum walls to form an enteringpassage from outside of said rail beams to within said drum, saidpassage intersected by said rail beams to form spaced openings aroundthe outer portion of said passage, a material feed at approximatelyforty-five degrees to the horizontal and at a point approximatelyforty-tive degrees above the hori.

zontal on the side of the drum to feed material into the passage, adeecting structure secured to the rail beams and rotating with thesupporting drum frame at least four feed chutes sectorially dividing thespace between said drum sections to alternately feed the materialreceived from the material feed through the' passage on to therespective initial screen areas of the drums as the breaker rotates,each feed chute having a deilecting surface extending from a point onthe axis of the drum and in the plane of the radial flanges and wideningoutwardly to the inner peripheral edge of the opposite radial flange fordiverting the radially entering material from the material feedlongitudinally at an angle through the opening between the center pointand the inner edge of the flange and drop it on to the respectiveinitial screening area for sorting out the oversize material and passesit along the drum, lift shelves mounted on the re spective drum wallsextending along the screening area to the end spider to pick thematerial up and break it to the proper size for passing through theopenings, hammer rotors rotatably mounted on the spiders at one end ofeach drum section for receiving the final oversize material and reducingit to the proper size.

l0. A Bradford type breaker comprising a supporting drum frame havingend spiders and longitudinal parallel bars uniformly spaced on saidspiders in a cylindrical shape, drum walls with screening openingsmounted on said bars to form two axially aligned drum sections of equallength having adjacent ends axially spaced to form a peripheral openingmidway between the spiders for material to enter into said drum sectionseach with initial screen area adjacent the passage, two circumferentialflanges each extending radially through the peripheral opening andpositioned on the adjacent spaced edges of said drum walls to form anentering passage from outside of said drum to within said drum, hubspositioned on the axis and at adjacent ends of the drum to form openingsbetween the corresponding flanges said passage intersected by said railbeams to form spaced openings around the outer portion of said passage,a material feed at approximately forty-five degrees and positioned at apoint approximately forty-five degrees from the horizontal position tofeed material into the passage, a deflecting structure secured to therail beams and rotating therewith having at least four feed chutessectorially dividing the space between said drum sections to alternatelyfeed the material received from the material feed through the passage onto the respective initial screen areas of the drums as the breakerrotates, each feed chute comprising a deflecting surface, a leadingsurface and a trailing surface, said deflecting surface extending from ahub point on the axis of the drum and in the plane of one of the radialflanges and widening outwardly to the inner peripheral edge of theopposite radial flange for diverting the radially entering material fromthe material feed longitudinally at an angle through the opening betweenthe hub and the inner edge of the corresponding flange, said leadingsurface being axially disposed crosswise of the passage and extendinginwardly towards the hub from the bars to the intersectors of adjacentdetlecting surfaces for separating one preceding feed chute from onesucceeding feed chute, said trailing surface being axially disposedcrosswise of the passage and extending inwardly to the hub to provide adiverting surface between said deilecting surface and the plane of theconcentric opening to collect entering material and direct it incooperation with the deflecting surface onto the screen area of arespective drum section, said initial screening area sorting out theoversize material and passing it along the drum, lift shelves mounted onthe drum walls extending along the screen areas to the respective endspiders to pick the material up and drop it on the drum wall to break itto the proper size for passing through the openings, hammer rotorsrotatably mounted on spiders at each end of the drum for rel() ceivingthe remaining oversize material and reducing it to the proper size.

11. A Bradford type breaker comprising a supporting drum frame havingend spiders and longitudinal parallel bars uniformly spaced between saidspiders in a cylindrical shape, drum walls with screening openingsmounted on said bars to form two axially aligned drum sections havingadjacent ends axially spaced to form a peripheral opening for materialto enter said drum sections each with a'n initial screening areaadjacent the passage, two circumferential flanges each extendingradially to the peripheral opening and positioned at the adjacent spacededges of said drum walls to form an entering passage from outside ofsaid rail beams to Within said drum, said passage intersected by saidrail beams to form spaced openings around the outer portion of saidpassage, a material feed to feed material into the passage, a deilectingstructure secured to the rail beams and rotating with the supportingdrum frame at least four feed chutes sectorially dividing the spacebetween said drum sections to alternately feed the material receivedfrom the material feed through the passage on to the respective screenareas of the drums as the breaker rotates, each feed chute having adeilecting surface extending from a point on the axis of the drum and inthe plane of the radial flanges and widening outwardly to the innerperipheral edge of the opposite radial flange for diverting the radiallyentering material from the material feed longitudinally at an anglethrough the opening between the center point and the inner edge of theflange and drop it on to the respective initial screening area forsorting out the oversize material.

12. A Bradford type breaker comprising a rotatable drum of generallycylindrical shape and having two axially spaced crushing drum sections,two circumferential flanges extending radially and spaced axially fromone another to form a peripheral passage between adjacent ends of saiddrum sections, sectorial dellecting chutes uinformly arranged around theaxis and alternately facing in opposite longitudinal directions toextend radially inwardlyfrom a respective flange at a longitudinal angleto the axis of the drum in the path of material entering between saidflanges and alternately deflecting said material into the drum sections.

13. A Bradford type breaker as claimed in claim l2 wherein plates areprovided on the radial sides of the deflecting chutes to form radialdeecting passages from between said flanges into respective drumsections.

14. In a breaker type mill the combination of a rotatable drum ofgenerally cylindrical shape, an aperture girdling said drum and rotatingtherewith for introducing material into the drums, feeding meanspositioned exteriorly to and above the upper half of said drum forprojecting material into said aperture, dellecting means rotating withsaid drum extending radially inwardly and longitudinally at an angle tothe axis of rotation of the drum across the radial projection of saidaperture to directly receive the radially projected material from saidfeeding means and deflect said material longitudinally into said drumwithin half a rotation of the drum.

15. A breaker mill comprising a rotatable drum having walls formed ingenerally cylindrical shape with perforations for passing comminutedmaterial thereto, opening means girdling said drum and rotatingtherewith for continuous introduction of material into the drum andintermediately positioned in said drum walls dividing said drum into twocrushing zones, deecting means interiorly and radially spaced from saidopening means and having a plurality of chutes extending longitudinallyy at an angle to the central axis to extend radially across said openingmeans and arranged to alternately face in opposite longitudinaldirections for alternately deflecting said substantially radiallyentering material to project into a respective crushing zone forcomminution by said drum to the desired size.

16. In a breaker type mill the combination of a rotata- 1 1 ble drum ofgenerally cylindrical shape having two longitudinally spaced crushingzones, feeding means in said drum between said zones comprising aplurality of apertures consecutively and contiguously arranged aroundthe periphery of said drum, deecting means contiguous to and extendingradially inwardly from said apertures and having a plurality of deectingsurfaces forming radially extending passages from said apertures to theinterior of the crushing zones, each surface radially coextensive with arespective aperture and alternately extending longi- References Cited inthe file of this patent UNITED STATES PATENTS Janney Apr. 2, 1918 CroweMay 3, 1927

